I am supposed to be about 6 weeks according to my LMP but at my Dr. Visit yesterday an ultrasound was performed and no baby was visible. Dr said my pregnancy test came back positive so tha dates must just be off and I'm not as far along as I was originally told.. but the only that's possible is if my period occurred a week later than it actually did. This baby is a planned baby so I know FOR SURE when my last period was.. how can this be? Any ideas? This happen to anyone else?